Package name fixed for Ubuntu

This fix will require the required package downloaded from Ubuntu cloud also.

Missing directoried are added for Ubuntu installation.

Removed the agent name change. Will retry the error creation again.

Added only_if for ubuntu check and the privilidge is changed to 0755 from 00755

After checking my ubuntu system, it seems the name of the service includes plugin. So i am adding it again.

The deb packages are seems to be missing duing Ubuntu installation. neutron-plugin-metering-agent deb package download from
Ubuntu Cloud repos should be added to the ISO creation step.

Directory user and owner is fixed with right syntax

Syntax fixed

Syntax fixed

Spaces are fixed. Unnecessary comment line is removed.